Loose-leaf binder.



E. A. TRUSSELL.

LOOSE LEAF BINDER.

APPLICATION FILED MAR. 5. 1915.

1,150,719.. Patented Aug. 17,1915.

Fig-6',

-"11 I 26 25 9 A /21 i w X j f'\ 1 6L A ms q Vi/bnwa w nuem/bo z X12 ATTORNEYS EMORY-A. TRUSSELL, OF NEW YORK, N; LEAF BOOK COMPANY, OF NEW @QETTJE.

Y, ASSIGNOR TO sooner/r & PEASE LOOSE YORK, 1v. Y.,'A' oonronarron or MISSOURI.

LOOSE-LEAF BINDER.

ncome.

To all whom it may concern:

Be it known that I, EMoRY A. TRUssnLL, a citizen of the United States of America, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Loose-Leaf Binders, of which the following is a specification.

The main object of my invention is to provide a loose-leaf binding device, having the metal parts very simple in construction, economical to manufacture and easily applied to the book cover. This object I attain by the construction which I will now describe.

In the accompanying drawing, Figure 1 is a perspective View of the metal parts of my invention in their simplest form, one of the spring plates being shown detached and in section; Fig. 2 is a transverse sectional view, drawn to a larger scale, showing the metal parts applied to the book back, and with the leaf-holding rings or prongs closed; Fig. 3 is a plan view, withone of the spring plates removed; Figs. 4 and 5 are sectional views on the lines H and 55, respectively, Fig. 3, and drawn to a larger scale; and Fig. 6 is a transverse section of a modification.

Referring to Figs. 1 to 5, it will be seen that in this the simplest form of my invention, the metal parts of the binder consist of four parts only, namely, two like parallel bars A, A each provided at each end with matching half rings or prongs a, a, and a a and one or more spring covers B and B fitting over the two bars A, A The curved prongs 01, a, (a a are formed in one with their respective bars A (A and they may conveniently be formed from rods of flattened oval cross section as seen in the drawings, one edge of each bar bearing against the corresponding edge of the other bar, as seen in Figs. 2 and 3. At theiradj acent edges I form cooperating recesses and spurs. Thus as shown in Figs. 1, 3

and 5, I strike up from the edge of bar A, a spur 10 on the upper side, and a recess 11 immediately under it on the lower side. At a corresponding point on what will be the adjacent edge of the bar A I swage downwardly a recess 12 to receive the spur 10, and by the same operation form on A a spur 13 to enter recess 11 onbar A. Similar corresponding spurs and recesses, but red I Specification of Letters Patent.

which the prongs a,

Patent-eel Aug. 17, 1915.

Application filed March 5, 1915. Serial N 0. 12,345.

versed, are formed in the adjacent edges of the bars near by, as at the section line 4.4, Fig. 3, and as shown in Fig. 4. These sets of spurs and recesses thus mesh and retain the bars in engagement under the action of the embracing springs B and B In the drawing I have shown two separate spring plates B and B each consisting of an inverted U-shaped plate of suflicient width to extend over the pair of bars A, A and in order that the outer edges of the latter may find proper bearings against the side walls of the springs B, B I prefer to swage the edges of the bars so as to force the metal outward to form projecting fins 20 and 21, Figs. 1, 2 and 3. Indentations 22 are at the same time formed in the parallel side walls of the springs B, B to take under these projecting fins 20 and 21. The bars A and A are thus hinged to each other and to the side walls of the plates B, B with a toggle action, and the tops of the spring plates B and B are curved so as to provide the required elasticity for the rocking of the toggle from the to the open position of the prongs or half lungs.

The lower e'dges of the side walls of the plates B, B are provided with pointed teeth 25 such that they may be driven into the back C of the book cover, Fig. 2, and be clenched there to secure the described metal parts to the book.

I may provide a cover plate D, Fig. 6, which is arranged to cover the whole length of the bars A, A and the springs B, B and to extend beyond the prongs a, a This cover plate has lateral slots 27, 28 through a, may pass. These lower edges of the side walls of this "cover plate are provided with teeth 26, similar to the teeth 25, to be driven into the back 0. Where this cover plate is used, the teeth 25 on the springs B, B may be omitted.

I claim as my invention 1. A loose-leaf binding device, comprising bars carrying curved prongs, with pairs of reversed spurs and recesses at the adjacent edges of the bars and spring means to act upon the outer edges of the bars with toggle eifect.

2. A loose-leaf binding device, comprising bars carrying curved prongs, with pairs of reversed spurs and recesses punched out on positions shown in Fig. 2

the adjacent edges of thebars and spring means to act upon the outer edges of the bars with toggle efiect. 1

V ,3. loose-1eaf binding device, comprising bars carrying curved prongs, with cooperating spurs and recesses at the adjacent edges of the bars, and projecting fins on the outer edgesof the bars and a spring plate means embracing the bars and bearing against the A loose-leaf binding device, comprising bars carrying curved prongs, with co6perat- ,ing spurs and recesses at the ad acent edges of the bars, projecting fins punched out at Copies of this patent may be obtained for together at theirinner edges, projecting fins at the'outer edges, a spring plate means embracmg thebars and bearlng against sald 6. A loose-leaf binding device, comprising bars carrying curved prongs 'and;hin.ged to- "fins, saidplates having indentations totake 7 under the fins. v

:bearing against their outer edges, said spring plate means having teeth adapted to bedriven into the back of the book cover.

In testimony whereof I have signed my name to thisspe'cification, in the presenceof two subscribing Witnesses;

EMORY A. TRUSSELL.

Witnesses:

M. G. Knnt, L. H. Grown.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

